/* -------------------------------------------------------------------------
 *
 * rowsecurity.h
 *
 *      prototypes for rewrite/rowsecurity.c and the structures for managing
 *      the row security policies for relations in relcache.
 *
 * Portions Copyright (c) 1996-2017, PostgreSQL Global Development Group
 * Portions Copyright (c) 1994, Regents of the University of California
 *
 * -------------------------------------------------------------------------
 */
#ifndef ROWSECURITY_H
#define ROWSECURITY_H

#include "nodes/parsenodes.h"
#include "utils/array.h"
#include "utils/relcache.h"

typedef struct RowSecurityPolicy
{
    char       *policy_name;    /* Name of the policy */
    char        polcmd;            /* Type of command policy is for */
    ArrayType  *roles;            /* Array of roles policy is for */
    bool        permissive;        /* restrictive or permissive policy */
    Expr       *qual;            /* Expression to filter rows */
    Expr       *with_check_qual;    /* Expression to limit rows allowed */
    bool        hassublinks;    /* If either expression has sublinks */
} RowSecurityPolicy;

typedef struct RowSecurityDesc
{
    MemoryContext rscxt;        /* row security memory context */
    List       *policies;        /* list of row security policies */
} RowSecurityDesc;

typedef List *(*row_security_policy_hook_type) (CmdType cmdtype,
                                                Relation relation);

extern PGDLLIMPORT row_security_policy_hook_type row_security_policy_hook_permissive;

extern PGDLLIMPORT row_security_policy_hook_type row_security_policy_hook_restrictive;

extern void get_row_security_policies(Query *root,
                          RangeTblEntry *rte, int rt_index,
                          List **securityQuals, List **withCheckOptions,
                          bool *hasRowSecurity, bool *hasSubLinks);

#endif                            /* ROWSECURITY_H */
